Follow these simple steps to whip up a batch of savory breakfast muffins that are sure to impress:

1. Preheat your oven to 350°F (175°C) and grease a muffin tin to prevent sticking.
2. Mix the dry ingredients: In a large bowl, combine the all-purpose flour, cornmeal, baking powder, and salt. Stir them together until well mixed.
3. Prepare the wet ingredients: In a separate bowl, whisk together the milk, vegetable oil, and eggs until the mixture is smooth and well combined.
4. Combine wet and dry ingredients: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix, as this can lead to dense muffins.
5. Fold in cheese and veggies: Gently fold in the shredded cheese and chopped vegetables of your choice, ensuring they are evenly distributed throughout the batter.
6. Pour batter into the muffin tin: Fill each cup of the muffin tin about 2/3 full with the batter, leaving enough room for the muffins to rise as they bake.
7. Bake the muffins: Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until the muffins are golden brown and a toothpick inserted into the center comes out clean.
8. Let cool slightly: Remove the muffins from the oven and allow them to cool slightly in the tin before serving.